论文标题
FESE $ _ {1-x} $ s $ _x $的晶格，旋转和电荷属性的演变
Evolution of lattice, spin, and charge properties across the phase diagram of FeSe$_{1-x}$S$_x$
论文作者
论文摘要
提出了一项涵盖FESE $ _ {1-x} $ s $ _x $实心解决方案的整个替代范围的拉曼散射研究。数据作为硫浓度$ x $的函数，价格为$ 0 \ le x \ le 1 $，温度和散射对称性。详细分析了所有类型的激发，包括声子，旋转和电荷。据观察，与铁相关的B $ _ {1G} $声子模式的能量和宽度在整个硫取代范围内都不断变化。 $ _ {1G} $ chalcogenide模式在$ x = 0.23 $以上消失，并以$ x = 0.69 $的价格重新出现。以类似的方式，在$ _ {1G} $对称性中以有限掺杂出现在有限掺杂上的光谱特征会不一致。大约500 cm $^{ - 1} $以$ x = 0.23 $消失的磁激励在$ _ {1G} $ lattice激发表现出不连续的能量变化。与波动相关的低能模式在Nemato结构过渡时显示最大强度，从而跟踪相边界。
A Raman scattering study covering the entire substitution range of the FeSe$_{1-x}$S$_x$ solid solution is presented. Data were taken as a function of sulfur concentration $x$ for $0\le x \le 1$, of temperature and of scattering symmetry. All type of excitations including phonons, spins and charges are analyzed in detail. It is observed that the energy and width of iron-related B$_{1g}$ phonon mode vary continuously across the entire range of sulfur substitution. The A$_{1g}$ chalcogenide mode disappears above $x=0.23$ and reappears at a much higher energy for $x=0.69$. In a similar way the spectral features appearing at finite doping in A$_{1g}$ symmetry vary discontinuously. The magnetic excitation centered at approximately 500 cm$^{-1}$ disappears above $x=0.23$ where the A$_{1g}$ lattice excitations exhibit a discontinuous change in energy. The low-energy mode associated with fluctuations displays maximal intensity at the nemato-structural transition and thus tracks the phase boundary.
